compare_routes

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description must fully disclose behavioral traits, but it only states 'compare'. It does not mention whether the operation is read-only, requires authentication, what side effects occur, or what the response contains. This is insufficient for safe agent invocation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is very short (one sentence), which is concise, but it omits essential details. It is not that every sentence earns its place because the single sentence fails to convey enough information. It could be improved by adding necessary context without becoming verbose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the lack of output schema and annotations, the description should cover return values and behavior, but it does not. The tool requires one parameter, yet no information about what the agent can expect from the tool is provided, making it incomplete for safe and effective use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, so the description must compensate, but it only mentions 'airport pairs' without specifying the required format (e.g., IATA codes) or any constraints on the origin/destination strings. The nested array parameter is not explained, leaving the agent with no guidance on valid input structure.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the verb 'compare' and identifies the resource as 'airport pairs', which gives a basic idea. However, 'generic route metadata' is vague and does not clarify what aspects are compared or what the output format is. This ambiguity reduces clarity, though it is not a tautology.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives like 'search_travel_options' or 'get_airport_info'. The description lacks any context about appropriate scenarios or limitations, leaving the agent to infer usage without support.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.